I would inform a local newspaper and radio station about it.
The online editions of the newspaper and radio are able to describe and market your new product. Most editors are happy to try out new apps and write about it.
In my case, Facebook forums have been the best sources for customers. I have 2 stock market research apps and joined several Facebook forums dedicated to investing. I post there with screenshots and links to the apps typically as a response to someone’s question. I have noticed a jump in downloads after posting. Of course, every post needs to be relevant to the topic.
In my humble opinion, organic communities and crowdfunding are extremely underrated. Of course, those require a lot of pre engagement and transparency!
Quora has been super useful for me to generate some traffic for my platform www.dropurcard.com/home , but you need to write lot of useful content before you get noticed.
When I launched https://isoflow.io, a friend of mine posted a link on HackerNews which generated a lot of traffic. Great audience for tech products there.
Hello, we are excited to share our newly developed app in the field of financial technologies with you. We would love for you to download and try it from the App Store and share your feedback with us. Your valuable insights will help us further improve the app. Thank you in advance!
https://apps.apple.com/tr/app/fi...
I am a noob, but I am starting with Product Hunt Ship and I think it makes the point. We are thinking about launching next month and here we can engage with our community earlier and get feedback.
@anxo_armada@gauravbora we are really starting, yesterday I created our first landing producthunt.com/upcoming/kudu and I am iterating on it. We hope today we can add the first version of the product video. We want to launch on PH December 15, feedback welcome!
My first impressions are quite good, it allows you to hype your little community and attract new ones around feedback and the product hunt launch. You have tools to easy communicate with all of them or a subset.
Makerlog, IndieHackers and Twitter are my go-to choices for communities but SEO/organic traffic from search are where it's at for really targeted traffic long-term